Introducción

Replace your PRAM battery & USB board to preserve date and time after system shutdowns and to fix an unresponsive front USB port.

  1. Use your thumbs to push the two battery retaining tabs away from the battery.
    • Use your thumbs to push the two battery retaining tabs away from the battery.

    • The battery should pop up enough to rotate it toward yourself and lift it out of the lower case.

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  2. Remove the three 2.3 mm Phillips screws securing the memory cover to the lower case.
    • Remove the three 2.3 mm Phillips screws securing the memory cover to the lower case.

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    • Lift the memory cover slightly and pull it toward yourself to remove it from the lower case.

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    • Remove the following ten screws:

      • Two 14.7 mm shouldered Phillips.

      • Three 12.3 mm Phillips.

      • One 3.8 mm T8 Torx.

      • One 6.8 mm T8 Torx.

      • Three 1.3 mm Phillips.

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    • The ZIF cable is located underneath the bottom RAM slot. If your PowerBook has both RAM slots occupied, make sure to remove the RAM chip.

    • Use your fingernails to separate the ZIF cable lock away from its socket. (Move the two brown bits down 1mm)

    • The ZIF cable lock will move about a millimeter away from the socket before it stops (see picture 2). Do not try to remove the ZIF cable lock.

    The ZIF cable locks are the little grey pieces seen on the cable-side ends of the white bar. They will slide, as per detailed picture, toward the cable.

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    • Use the tip of a spudger to slide the trackpad ribbon cable out of its socket.

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    • Remove the four 3.4 mm Phillips screws from the PC card side of the PowerBook.

    • When replacing these screws, you must reinstall each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there.

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    • Remove the four 3.4 mm Phillips screws from the DVI connector side of the PowerBook.

    • When replacing these screws, you must reinstall each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there.

    • During reassembly, make sure to reinstall the two screws on the right into their appropriate locations, and not the DVI port anchor holes.

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    • Depress the display latch release button and open your display.

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    • Starting near the display, lift the upper case straight up off the lower case, minding any cables that may get caught.

    Sometimes the "tags"/"lugs" that are around the edge of the top & bottom frame, be careful not to bend them as when putting back the covers they will not merge. I used a screwdriver to poke through the hole the screw was supposed go in & push against the "inside nut" to let the tag from the top slide down between the 2 tags. The "inside nut" is like the one right next to the ribbon cable as shown in Dia.14. The screws are from Dia. 7&8.

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    in what direction does one move the ZIF cable lock? what/where is its socket?

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    When putting the machine back together (following steps in reverse), make sure the trackpad ribbon cable comes through the underside of the computer — there is an opening that the cable needs to go through and you will want to “thread the needle” with the cable before securing the upper case again.

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    • Use the flat end of a spudger to pry the optical drive cable connector up off the logic board.

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    • Remove the following four screws securing the optical drive to the lower case:

      • Three 6.8 mm T8 Torx.

      • One 3.8 mm T8 Torx.

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    • Lift the optical drive out of the lower case, being careful not to disturb the PRAM battery & USB board ribbon cable.

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    • Use your fingernail and the tip of a spudger to raise the ZIF cable lock slightly up off its socket.

    • The ZIF cable lock should raise about 1 mm and stop. Do not attempt to completely remove the ZIF cable lock.

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    • Pull the ribbon cable straight up out of the ZIF socket.

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    • Remove the two T8 Torx screws securing the PRAM battery & USB board to the lower case.

    • Pull the board away from the side of the lower case to separate the USB socket from the bezel on the lower case.

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    • Lift the board slightly out of the lower case and peel the small foam EMI gasket off the USB socket, then remove the PRAM battery & USB board from your powerbook.

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Conclusión

To reassemble your device, follow these instructions in reverse order.

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